Removable self-jetting pile

ABSTRACT

A removable self-jetting pile comprises a body shell, a concrete conically shaped nose portion, and a jetting tube extending from an opening in the nose portion to the upper portion of the shell. The pile is formed by setting one end of the shell in an inverted truncated cone-shaped pouring form, mounting the jetting tube in the truncated end of the form and supporting it within the shell, and pouring concrete into the shell until the pouring form and at least a lower adjacent portion of the shell are filled with the concrete.

[451 May 23, 1972 3,206,936 9/1965Moor....................................6l/53.64 RM 1 E 8mm 140 MunseyPlace, 839,954 1/1907 Raymond..........................6l/53.74X IslandFOREIGN PATENTS OR APPLICATIONS (U969 270,563 1914Germany..............................6l/53.74 21 Appl.No.: 862,684

Primary Examiner-Jacob Shapiro Attomey-Pennie, Edmonds, Morton, Taylorand Adams United States Patent Sexauer [54] REMOVABLE SELF-JE'ITING PILE[72] Inventor:

[22] Filed:

ABSTRACT A removable self-jetting pile comprises a body shell, a

ICIainuSDrawlngFlgures concrete conically shaped nose portion, and ajetting tube extending from an opening in the nose portion to the upperportion of the shell. The pile is formed by setting one end of the shellin an inverted truncated cone-shaped pouring form, mounting the jettingtube in the truncated end of the form and supporting it within theshell, and pouring concrete into the shell until the pouring form and atleast a lower adjacent por tion of the shell are filled with theconcrete.

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ATTORNEYS REMOVABLE SELF-JE'I'IING PILE This invention relates tobuilding and structure-supporting piles and, more particularly, to aremovable self-jetting pile of this type.

Structure-supporting piles for land and marine use are generally formedof steel or wood so that they can be driven into place, but oncepositioned they cannot be removed with any facility and thus are notadapted for supporting temporary structures. Composite piles, formed ofa shell-like body portion and filled with a matrix, have been proposedheretofore but they usually lack the strength to be driven into placeand some have been provided with peripheral jet tubes to facilitatetheir installation.

I have now devised a removable self-jetting pile which can beconstructed or assembled at the site of its use and which isself-mounting and readily removable for re-use. The pile of thisinvention comprises a cylindrical body shell, a substantiallyconically-shaped concrete nose portion secured to the lower end of thepile shell, and a jetting tube positioned within the pile extending froman exterior opening in the nose portion to the upper portion of theshell. The pile is formed by positioning the lower end of the shell in apouring form having the shape of an inverted truncated cone, positioningthe jetting tube substantially axially of the shell and extending fromthe truncated lower end of the pouring form to the upper portion of theshell, pouring concrete through the top of the shell in amountsufficient to fill the pouring form and at least a portion of theadjacent lower end of the shell, and removing the pouring form after theconcrete has set.

These and other novel features of the present invention will be morefully understood from the following description taken in conjunctionwith the accompanying drawings in which FIG. 1 is an elevation view,partly broken and partly in section, of the pile in its position in thepouring form;

FIG. 2 is an elevation view of the pile, partly in section, in itsfinished form; and

FIGS. 3 and 4 and 5 are partial elevation views of a variety of jointswhich can be used in connecting a plurality of shell sections.

As shown in FIG. 1, the pile of my invention is formed by setting acylindrical sleeve or shell 6 of plastic, steel, fiber glass, or thelike, in an inverted cone-shaped pouring form 7, the lower end of thecone being cut away or truncated to form an opening 8. A pipe nipple 9is positioned in the opening 8 and then a central tube of plastic,steel, fiber glass, or the like, is secured to the upper end of thenipple with a clamp l 1, or the like. The lower end of the nipple 9 isadvantageously threaded so that it can be provided with a similarlythreaded jet nozzle 12. The tube 10 extends up to the top of the sleeve6 and is supported there by being similarly clamped to an upper pipenozzle 13 which is threaded into a cap 14 which rests on the top of thesleeve 6. The cap is provided with one or more openings 15 through whichconcrete can be poured. Concrete is then poured into the sleeve throughthe openings 15 to fill up the conical pouring form 7 and to fill up thebottom end of the sleeve 6 at least above the level of bolts 16 mountedin the sleeve to serve as anchors for the concrete 17. In order toprevent inadvertent spillage of concrete into the jetting tube 6, thetop of the upper nipple 13 can be covered with an appropriate cap 18.After the concrete has set, the pile will have the form shown in FIG. 2after it has been lifted out of the pouring form 7.

As shown in FIG. 2, the pile need not comprise a single body shell orsleeve 6 but can be formed of a plurality of such shells. It will beappreciated, accordingly, that a pile of any desired length can beformed at the site of its use without the awkward requirement ofbringing to the site a one-piece shell of the necessary length. Pursuantto the invention, the individual shell sections 6 can be coupled duringassembly by any of a number of expedients represented typically by thoseshown in FIGS. 3, 4 and 5. In FIG. 3, the sections are provided with aresmooth surfaced and not threaded. In FIG. 5, the ends of the shellsections 6 are provided with complementary alternating slots 21 andteeth 22.

To use the pile, a source of water under pressure is secured to theupper nipple l3 and the water jets out through the lower nipple 9. Theweight of the concrete 17 serves to make the pile descend through theslurry of sand, soil or mud created by the jet. After the pile has beensunk to the desired depth, it can be filled with other material, such assand, crushed stone, concrete, or the like,if it is to be left therepermanently or the pile can be subsequently withdrawn by againconnecting a water supply to the jet to loosen the surrounding sand,soil or mud and by then pulling the pile out.

It will be readily seen, accordingly, that the pile of the presentinvention can be assembled and formed at the site of its use, that itcan be virtually any desired length, that it is selfjetting and does notrequire auxiliary jets to be sunk alongside of it, that it does notrequire external force to mount it in position, and that it can readilybe made a permanent fixture or can be removed readily by virtue of itsbuilt-in self-jetting feature.

I claim:

1. The method of forming a removable substantially hollow self-jettingpile which comprises positioning the lower end of a cylindrical shell ina pouring form having the shape of an inverted truncated cone,positioning a jetting tube substantially axially of the shell andextending from the truncated lower end of the pouring form to the upperportion of the shell, pouring concrete through the top of the shell inamount sufficient to fill the pouring form and the adjacent lower end ofthe shell to secure the concrete to internal projections within theshell, and removing the pouring form after the concrete has set.

1. The method of forming a removable substantially hollow selfjettingpile which comprises positioning the lower end of a cylindrical shell ina pouring form having the shape of an inverted truncated cone,positioning a jetting tube substantially axially of the shell andextending from the truncated lower end of the pouring form to the upperportion of the shell, pouring concrete through the top of the shell inamount sufficient to fill the pouring form and the adjacent lower end ofthe shell to secure the concrete to internal projections within theshell, and removing the pouring form after the concrete has set.